Reproducer for talking-machines



J. W, KA'UFMANN. REPRODUCER FOR TALKING MACHINES.

APPUCATION FILED IULY 17. 1919.

Patented Sept. 28, 1920.

2 SHEETS-SHEET R m M W A TTORNE Y8 J. W. KAUFMANN.

REPRODUCER FOE TALKING MACHINES- APPLICATION FILED JULY 11. 1919.

1,354, 197. PatentedSept. 28,1920

2 SHEETS-SHEET Z.

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WITNESSES INVENTOR 1 M 114 urn/VH5 A TTORNEVS PATENT OFF-ICE.

JOHN W. KAUFMAJNN, OF BALTIMORE, MARYLAND.

, REPRODUCEB FOR TALKIHG-MACHINES.

Application filed July 17, 1919.

T all to ham it may concern Be it known that I, JOHN W. KAUFMANN, a citizen of the United States, and a resident of Baltimore, in the State of Maryland, have invented certain new and use ful Improvements in Iieproducers for Tall ing-Machines, of which the following is a specification.

My invention is. an improvement in reproducers, and has for its object to provide a new and improved connection between the needle and the diaphragm controlling lever,

which will eliminate the usual rigidity be- 2 Figs. 6 and 7 are views similar to Fig. 5,

showing modified constructions;

Fig. 8 is a side view showing a modified form of needle holder.

In the embodiment of the invention shown in Figs. 1 to 5, the case 1 of the reproducer is connected. to the tone arm 2 and a bracket plate 3 is secured between the case and the tone arm,this bracket plate having a width approximately that of a diameter of the cas ing and being of considerably greater length, as shown, so that at the end remote from the needle it will extend well beyond the case, and the ends of the bracket plate are bent laterally, as shown at 4 and 5.

. A resilientmember 6 is provided for connecting the needle 7 with the diaphragm controlling lever 8, this plate being connected indirectly at one 'end with the needle and indirectly at the other with the lever. At the lever end a connecting frame of substantially rectangular form and consisting of sides 9 and integral ends 10 is provided for connecting the plate 6 with the lever 8. The sides 9 of this frame have perforated enlargements 11 intermediate their ends for receiving the shaft 12 which pivotally connects the frame and the adjacent angle portion 4 of the bracket plate. This shaft 12 Specification of Letters Patent.

Patented Sept. 28, 1920.

Serial No. 311,623.

is extended at its ends beyond the enlargements 11, and the said ends are journaled in openings 1n angle brackets 13 which are secured to the outer face of the portion Referring to Fig. 1 it will be seen that these laterally bent portions 4 and of the bracket plate are notched or recessed intermediate their ends, the notch or recess of the portlon 4: being for receiving the frame 9-10, while that in the portion 5 is for a purpose to be presently described.

The resilient plate 6 is of tapering form, belng of greatest width at the frame 910, and decreasing in width toward the needle, and atthe end adjacent to the frame the plate passes over the ends and beneath the shaft 12, and is firmly held to the frame by the shaft, the large end of the plate being bent to form a lip 14 which engages behind the adjacent end 10. At the shaft 12 the plate has a longitudinally extending slot 15 for receiving a perforated lug '17 on the lever 8. This lug receives the shaft 12 and the said lug firmly connects the lever to the. shaft, so that the lever will move with the frame, it being understood that the lever engages theends 10 of the frame on the under side of the frame. The perforation of the lug 17 is so arranged that the shaft will tightly hold the upper edge of the lever against the lower edges of the ends.

. The needle holder 18 is secured to the small end of the spring 6 by means of screws 19 or the like, and it has the usual open ing for receiving the needle 7 which is secured in place by the usual set screw 23. This needle holder 18 has journal pins 20 which engage openings in other angle brackets 21 corresponding to the brackets 13 at the opposite end of the bracket plate 3. These bracket plates are held to the laterally extending portions 4-5 0f the bracket plate by screw bolts, screws or the like. Referring to Fig. 3, it will be seen that the lever 8 has an angular lug 22 at the end remote from the frame 910 for connection with the diaphragm.

In operation, when theneedle 7 is in engagement with the groove of a record as shown in Fig. 1, it will be vibrated by the undulations in the groove, and will move with it the needle holder 18 which is rigidly secured to the plate 6. The vibrations of the needle will be transmitted by the plate 6 to the frame 9'10 and to the diaphragm frame 24. v g

In Fig. 7 the resilient plate 31' which corlever '8, which will vibrate the diaphragm in synchronism with the needle, but with amplified movement, due to the leverage between the parts and to the increasing strength of the plate 6, due to increasing width.

' 'In the embodiment of the invention shown in Fig. 6 the frame 24- which corresponds to the frame 9l0 of Fig. 1 is supported at one end of the bracket plate 25 in the same manner as the frame 9-10, but the shaft 26 which pivotally connects the frame to the bracket plate is in line with the diaphragm of the sound box 27. Because of this arrangement it isnecessary that the frame 2% set at an angle to the plane of the diaphragm, and the reproducing lever 28 is bent to conform with the changed position of the parts.

The resilient plate 29 which corresponds to the plate '6 of Fig. l is engaged bythe frame 2a in the same. manner, but this plate responds to the plate 6 is sinuous, as shown,

being curved in opposite directions'between the'frame 32 and the needleholder The frame 32 is pivoted to the bracket plate 33 which corresponds to the plate 3 of Fig. 1 at one end thereof, and the needle holder is pivoted to the other end. The reproducing lever 34: is connected to the frame in the i arrangement is somewhat more responsivethan thatshown in Fig. 1. ,It will be obvious that due to the sinuous contour of theconnecting plate 31 a large amount of relasame manner as the lever '8 of Fig. 1. This tive movement is permitted between the frame 32 and the needle holder 33 while at the same timethey areno'rmally held in a certain predetermined relation with respect to each other.

silient plate 6, 29 or 31, as the case may be, in the same manner as theff'raine910 is connected to the said plate, that is, the form of needle holder shownm'ay be replacedby that shown i nFig. 8. In this arrangement the needle holder 35 is integral with the 'ci'o'ss bar 36of a substantially rectangular frame 37 similar to the frame910 of Fig.

- 1. 'Thatendof'the plate 38 wl1ic hcorrediaphragm.

It will be obvious that the needle holder may be connected to the re;

sponds to the" plate 6 adjacent to the frame 37 is passed beneath theend members of the frame and above the cross bar 36 which, as

shown, isbeveled or substantially triangu- 6 .lar, the plate 38'engaging the apexof the cross bar.'

' It will be noticed, referring to Fig. 5, that the bracket plate 3 is held to the reproducer by means of a ri'n'g IO, which isjsecured to 7 the bracket plate in any suitable or desired manner, as, for lnstance, by brazing, and

this ring has an annular-rib at its inner edgewvhich fits about the reproducer and may be secured thereto by means of set 7 screws 41 or the like.

I claim:

1. In reproducers, a'bracket plate supported by the sound boxand extendingbeyond the same at one end of the plate, said plate 8 having at each end a laterallybent portion, a substantially rectangular frame pivoted to one of the laterally bent portions to swing on a central axis transverse to the frame,

a needle holder pivoted to the other to swing 8 on an axis parallel with that upon which the frame swings, and a resilient transmitting plate connecting the frame to the needle holder and extending transversely of the 2. In reproducers, the combination 'with the sound box, ofa bracket platezsupported the sound box and having at each end an angular portionextending toward the diaphragm of the sound box, a needle holder pivoted to one end of the platen-support for the reproducer leverpivoted to the other end of the plate to swing on an: axis parallel with that upon which the needle holder swings, and a resilient connection between the needle holder-and the said support for constraining them to move together.

' 3. In a reproducer, the combination'with the sound box,- of'a radial extension at one.

side thereof, a reproducing lever connected .1 with the diaphragm at its innerend and pivotally mounted on the extension at its outer end, a needle support pivoted to thejsound :box on osite the ivotalconnection of the l 1 lever and a resilient connectionbetween' the 1. I 7 r n I 7' v pivotal connection ofthe reproducer lever and the needle support. I

4. In a reproducer, the combination with the sound box, the needle support and the reproducing lever-,'of an extension extending '12; radially from the sound boxga pivotal support for theouter end of the reproducing lever at the outerend. of the extension, and a resilient connection between the needle support and thepivotal mountirig of the -1;i

reproducing lever r l 1 JOHN KAUFMANN. 

